//------------------------------------------------------------------------------ // // fpga_util.cpp // --------------------- // Utility FPGA routines // // Authors: Pavel Shatov // // Copyright (c) 2015-2016, NORDUnet A/S // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // - Redistributions of source code must retain the above copyright notice, // this list of conditions and the following disclaimer. // // - Redistributions in binary form must reproduce the above copyright notice, // this list of conditions and the following disclaimer in the documentation // and/or other materials provided with the distribution. // // - Neither the name of the NORDUnet nor the names of its contributors may be // used to endorse or promote products derived from this software without // specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE // POSSIBILITY OF SUCH DAMAGE. // //------------------------------------------------------------------------------ //------------------------------------------------------------------------------ // Headers //------------------------------------------------------------------------------ #include #include "ecdsa_model.h" #include "fpga_lowlevel.h" #include "fpga_util.h" //------------------------------------------------------------------------------ bool fpga_buffer_is_zero(FPGA_BUFFER *x) //------------------------------------------------------------------------------ // // Returns true when large multi-word integer x is zero. // //------------------------------------------------------------------------------ { int w; // word counter // try to find non-zero words for (w=0; wwords[w]) return false; // no non-zero words found return true; } //------------------------------------------------------------------------------ void fpga_buffer_copy(FPGA_BUFFER *src, FPGA_BUFFER *dst) //------------------------------------------------------------------------------ // // Copies large multi-word integer from src into dst. // //------------------------------------------------------------------------------ { int w; // word counter // copy all the words from src into dst for (w=0; wwords[w] = src->words[w]; } //------------------------------------------------------------------------------ // End-of-File //------------------------------------------------------------------------------